If the progression assessments for the two metrics are made on the same schedule for every patient, it shouldn’t be possible for PFS to be greater than TTP. A death in between progression assessments ought not to cause a patient to be deleted from the TTP dataset, but rather for TTP to be censored at the time of death.

“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”